/*
 * Copyright (c) 2013, SRI International
 * All rights reserved.
 * Licensed under the The BSD 3-Clause License;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 * 
 * http://opensource.org/licenses/BSD-3-Clause
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the aic-web-praise nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.sri.ai.lpitools.gwtgui.server;


import java.lang.reflect.Type;
import java.util.ArrayList;

import javax.servlet.http.HttpSession;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.sri.ai.lpitools.gwtgui.server.util.TreeNodeCollection;

/**
 * @author pwolf
 *
 */
public class CallBackListener implements CallBackListenerInterface {

	private HttpSession httpSession;
	private String treeNodesKey;
	public CallBackListener(HttpSession httpSession, String treeNodesKey){
		this.httpSession = httpSession;
		this.treeNodesKey = treeNodesKey;
	}
	/*
	 * (non-Javadoc)
	 * @see com.sri.ai.lpitools.gwtgui.server.CallBackListenerInterface#notifyAddBundledTreeNodes(java.lang.String, java.lang.String)
	 */
	@Override
	public void notifyAddBundledTreeNodes(String bundledNodes, String clientID) {

		//tell GSON how to deserialize
		Type collectionType = new TypeToken<ArrayList<String>>(){}.getType();
		ArrayList<String> bundle = (new Gson()).fromJson(bundledNodes, collectionType);

		getTreeNodeCollection().addSerializedNodes(clientID, bundle);
	}

	private TreeNodeCollection getTreeNodeCollection() {
		
		synchronized (httpSession) {
			TreeNodeCollection treeNodes = (TreeNodeCollection)httpSession.getAttribute(treeNodesKey);
			if (treeNodes == null) {
				treeNodes = new TreeNodeCollection();
				httpSession.setAttribute(treeNodesKey, treeNodes);
			}
			return treeNodes;
		}
	}

	/*
	 * (non-Javadoc)
	 * @see com.sri.ai.lpitools.gwtgui.server.CallBackListenerInterface#notifyUpdateStep(java.lang.String)
	 */
	@Override
	public void notifyUpdateStep(String stepString) {
		
		ServerMessageGeneratorServiceImpl x = new ServerMessageGeneratorServiceImpl();
		x.updateProcessing(stepString);

		
	}

}
